Can I delete a Project while preserving it's Wiki?

We are currently using the OnDemand product and would like to delete a project while preserving it's wiki (as a global space).

Alternatively, is there a way to convert a the Project Wiki to a Global Space Wiki (or are they the same). After converting or migrating the Project Wiki to a Global Space, the intent would be to delete the (empty) project, since we are currently only using the wiki on that project.

Hi team, I’m Avinoam, a product manager on Confluence Cloud, and today I’m really excited to let the Community know that all customers can now try out the new editing experience and see some of the ...